If your school offers it, you could take IB Theory of Knowledge, I haven’t taken it but it’s the closest thing to a philosophy class at most high schools. There’s also an online version! If you’re interested in learning more about philosophy just for the sake of learning it, Crash Course has a video series on it, I haven’t watched it but their content is always good. I know that ethics =/= philosophy, but if you like ethics (the subjects are pretty similar, right? I honestly have no idea) there’s a national high school ethics bowl. DECA also has a business law and ethics category - not that you’d be interested in business, it’s just something I happened to know about. You could also start a philosophy club? Colleges love initiative, and it could help you share your passion for philosophy with others. Good luck!